Which of the following cells of root allow the transport of ions in only one direction?

(1) Endodermis

(2) Pericycle

(3) Epidermis

(4) Cortical cell

(1) Growing regions of the plant

(2) Enlarged cells

(3) Soil

(4) Root hair

(1) Storage organs

(2) Developing flowers, fruits and seeds

(3) Young leaves

(4) Senescent part

(1) P,K

(2) S,N

(3) N

(4) All of these

(1) K

(2) N

(3) Ca

(4) S

1. An analysis of xylem exudate suggests that some of the nitrogen travels as inorganic ions and much of it is carried in the organic form as amino acids.

2. Small amount of P and S is also carried as inorganic compounds in xylem exudate.

3. There is exchange of material between the xylem and phloem.

4. Xylem transports inorganic nutrients while phloem transports organic materials, this observation was proved wrong by the analysis of xylem exudate.

(1) Depending on the season

(2) Depending on the plant's needs

(3) Depending on the phloem type

(4) Both A and B

(1) Water and minerals

(2) Water and sucrose

(3) Hormones and amino acid

(4) Hormones and sucrose

(1) Cohesion Flow hypothesis

(2) Pressure Flow hypothesis

(3) Mass fusion hypothesis

(4) Tension flow hypothesis

(1) Xylem is for water and mineral transport

(2) Phloem is for translocation of food

(3) Transport in phloem is multi directional as well

(4) The portion below the ring becomes swollen due to water